There are many OPOTOWSKI entries in the JRI-Poland database https://jri-poland.org/index.html
In addition to those records online up to 1905, JRI-Poland has now fully extracted the records of
Pabianice up to 1915. Information on all Pabianice records is available from the the Town Leader
who can be reached by visiting the "Your Town" page at: https://jri-poland.org/town/pabianice.htm
For information on records for other towns, write to [townname]@jri-poland.org
Stanley Diamond, M.S.M.
Executive Director, Jewish Records Indexing - Poland, Inc.